CN210071974U

CN210071974U - Electric energy-saving early warning device for commercial complex building

Info

Publication number: CN210071974U
Application number: CN201920747850.6U
Authority: CN
Inventors: 郑军勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-02-14
Anticipated expiration: 2029-05-23

Abstract

The utility model provides a commercial synthesis building electrical energy-saving early warning device, including N front end detecting element, repeater, monitoring host, human-computer interface and communication interface, the repeater is connected respectively to N front end detecting element, and the monitoring host is connected to the repeater, and human-computer interface and communication interface are connected respectively to the monitoring host, and every front end detecting element includes current transformer, voltage transformer, gathers the chip, communication interface, microprocessor and keyboard, and current transformer and voltage transformer connect respectively and gather the chip, gathers the chip, and microprocessor is connected respectively to communication interface and keyboard, the utility model relates to a rationally, convenient to use not only can take precautions against in the bud to electric fire, can also promote current fire alarm system's intelligent level greatly, has fine application prospect.

Description

Electric energy-saving early warning device for commercial complex building

Technical Field

The utility model particularly relates to an electric energy-conserving early warning device of commercial complex building.

Background

With the continuous high-speed development of national economy and the rapid promotion of urbanization process in China, the per-capita electricity consumption and the total electricity consumption of the national people are greatly increased, and the proportion of the number of electrical fire accidents in the total number of the fire accidents in China is larger and larger. How to reduce the incidence of electrical fire accidents in China has become an important problem to be solved urgently in the field of electrical safety research. According to the conventional electric fire monitoring equipment in the existing low-voltage distribution system in China, parameters such as current, voltage, temperature of a detection point and residual current generated by ground faults are monitored in real time mainly through various detectors in a distribution box, and when the monitoring parameters of the detection point are abnormal, the detectors send control and alarm signals. However, the existing electrical fire monitoring equipment also has corresponding disadvantages, and essentially, the existing electrical fire monitoring equipment still belongs to an alarm system, and can not comprehensively and effectively prevent the occurrence of electrical fire.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above-mentioned not enough, provide an electric energy-conserving early warning device of commercial complex building.

The utility model aims at realizing through the following technical scheme:

the utility model provides an electric energy-conserving early warning device of commercial synthesis building, including N front end detecting element, the repeater, the monitoring host computer, human-computer interface and communication interface, the repeater is connected respectively to N front end detecting element, the monitoring host computer is connected to the repeater, human-computer interface and communication interface are connected respectively to the monitoring host computer, every front end detecting element includes current transformer, voltage transformer, gather the chip, communication interface, microprocessor and keyboard, current transformer and voltage transformer connect respectively and gather the chip, communication interface and keyboard connect respectively microprocessor.

Each front-end detection unit is connected to the repeater via a field bus.

The microprocessor adopts STC90C51RD + single chip microcomputer chip.

The acquisition chip adopts an ATT7022E chip.

The utility model discloses following profitable effect has:

the utility model relates to a rationally, convenient to use not only can take precautions against in the bud to electric fire, can also promote current fire alarm system's intelligent level greatly, has fine application prospect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a front end detecting unit structure diagram of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1 and fig. 2, an electric energy-saving early warning device for a commercial complex building comprises N front-end detection units 1, a repeater 2, a monitoring host 3, a human-computer interface 4 and a communication interface 5, wherein the N front-end detection units 1 are respectively connected with the repeater 2, the repeater 2 is connected with the monitoring host 3, the monitoring host 3 is respectively connected with the human-computer interface 4 and the communication interface 5, each front-end detection unit 1 comprises a current transformer 6, a voltage transformer 7, a collection chip 8, a communication interface 9, a microprocessor 10 and a keyboard 11, the current transformer 6 and the voltage transformer 7 are respectively connected with the collection chip 8, and the collection chip 8, the communication interface 9 and the keyboard 11 are respectively connected with the microprocessor 10.

Each front-end detection unit is connected to the repeater via a field bus.

The microprocessor adopts STC90C51RD + single chip microcomputer chip.

The acquisition chip adopts an ATT7022E chip.

Electric energy quality detection and electric leakage detection unit: the system mainly completes the main functions of signal acquisition, power quality analysis, electric leakage detection and the like.

A repeater: the expansion and the relay of a field bus are mainly completed, the field bus is used for long-distance data transmission, and the storage function of regional data is considered.

The monitoring host computer: the device is mainly responsible for state detection of the electric energy detection unit and the electric leakage detection unit and acquisition, analysis and processing of related data. And the early warning data can be easily imported into a corresponding monitoring and management system, so that the sharing of the early warning data and other systems is realized. Meanwhile, in the monitoring system, a corresponding system management interface is utilized, and a main wiring diagram is dynamically simulated to display the leakage state and the on-off state of a circuit, so that the dynamic monitoring of a monitoring point in a monitoring room can be realized, and prompt information or an alarm signal is automatically sent out to remind an operator to go to process and indicate the specific position or loop number of early warning. Meanwhile, the early warning system also has the functions of automatically generating and storing early warning and reset event record information, and is convenient for operators to inquire.

Communication interface, human-computer interface: the communication interface of the electric fire early warning system comprises RS-232, RS-485, a universal network interface and the like, mainly realizes the data exchange and networking between the monitoring host and external equipment, and can output signals such as images, videos and the like to form a friendly man-machine interaction interface.

The early warning device gives consideration to the basic functions of the traditional electrical fire alarm system, and the electric energy quality analysis and harmonic analysis functions are added on the basis, so that the automation degree of the power distribution system is greatly improved, various basic parameters of the operation of the low-voltage power grid are monitored more comprehensively, and the fire hazard is found and eliminated in time. The measurement front end is the core of the device, and the harmonic analysis and the power quality monitoring are completed by adopting the international latest power quality special analysis chip and the embedded processor.

The electric energy quality analysis unit mainly comprises a signal acquisition part and a signal analysis part, and the signal acquisition module: this module is through three group's electric currents, voltage transformer respectively with three-phase alternating current conversion to millivolt grade to input to the corresponding passageway of electric energy quality analysis chip, the signal analysis part: the core of the signal analysis part is a high-precision three-phase electric energy special metering chip ATT7022E produced by spring photoelectric technology, ATT7022E is a multifunctional electricity larceny prevention three-phase electric energy special metering chip, and is particularly suitable for the fields of building low-voltage power distribution systems and industrial production. Because the ATT7022E chip is internally integrated with a high-precision digital signal processing circuit, the device can accurately measure various operating parameters of a power system, such as current, voltage, frequency, phase angle and the like, and in addition, the ATT7022E also supports phase correction and full digital gain, so that the measurement error can be effectively reduced. More importantly, the sampling data buffering function provided by the ATT7022E can store ADC original sampling data according to waveform sampling frequency, and can accurately measure 41-th harmonic, which is particularly important for electric fire early warning. And a 1024 x 16bit synchronous buffer is also provided inside the ATT7022E, so that synchronous sampling data can be provided, the synchronous sampling data is convenient to use for subharmonic analysis, and preprocessing is not needed.

And (3) harmonic analysis: the voltage and current channel signals are sampled at the waveform sampling frequency of 14.4k Hz through the setting of ATT7022E, and as 14.4k Hz is far greater than the power frequency of a power grid of 50Hz, the original information of the signals can be completely reserved by waveform sampling according to the Nyquist theorem. When the single chip microcomputer reads original sampling data, the original sampling data are sent to an upper computer through a serial interface of the single chip microcomputer, the data are led into MATLAB, and 288 sampling points in each period of waves at the sampling frequency of 14.4k Hz are obtained through corresponding numerical value conversion and processing.

Claims

1. The utility model provides an electric energy-conserving early warning device of commercial complex building, includes N front end detecting element, repeater, monitoring host computer, human-computer interface and communication interface, its characterized in that: the N front-end detection units are respectively connected with the repeater, the repeater is connected with the monitoring host, the monitoring host is respectively connected with the human-computer interface and the communication interface, each front-end detection unit comprises a current transformer, a voltage transformer, a collection chip, a communication interface, a microprocessor and a keyboard, the current transformer and the voltage transformer are respectively connected with the collection chip, and the collection chip, the communication interface and the keyboard are respectively connected with the microprocessor.

2. The electric energy-saving early warning device for commercial complex buildings according to claim 1, characterized in that: each front-end detection unit is connected with the repeater through a field bus.

3. The electric energy-saving early warning device for commercial complex buildings according to claim 1, characterized in that: the microprocessor adopts STC90C51RD + single chip.

4. The electric energy-saving early warning device for commercial complex buildings according to claim 1, characterized in that: the acquisition chip adopts an ATT7022E chip.